发明人郭海燕,胡光,罗永刚. "Method for the Synthesis of Methyl (S)-1-oxo-2-azaspiro[4.4]Nonane-3-carboxylate" [P]. 中国发明专利, 专利号 CN 116771290 B, 授权公告日 2023-12-17.
O'Brien P Q, Kumar R, Williams B T. "A Process for Preparing High-Purity Methyl (S)-1-oxo-2-azaspiro[4.4]Nonane-3-carboxylate" [P]. US Patent, US 9157286 B2, 2022-09-11.
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